Re: The server is not operational

From: CalSun (calsun_at_gmail.com)
Date: 07/22/05 

Date: Fri, 22 Jul 2005 08:57:55 -0700

Thanks again for the advice.

I didn't solve the problem yet, but I think I make some progress on it.

I removed my laptop from the domain and ran myweb application on my laptop. I could such the AD box for a valid user, however, it failed as I try to query the groups that user belongs to. The error message is "The specified domain either does not exist of could not be contacted".

While I'm googling for the ans, I appreciate your input and help.

thanks
--CalSun
  "Joe Kaplan (MVP - ADSI)" <joseph.e.kaplan@removethis.accenture.com> wrote in message news:uLhTbpajFHA.1948@TK2MSFTNGP12.phx.gbl...
  If you can, you might try putting MS's ldp.exe tool on the web server to try various connect, bind and search operations with it as well to verify the connectivity and such. Remember also that DNS needs to be able to resolve whatever DNS names you are using in your path, in case DNS might be configured totally different in the DMZ or something.

  Best of luck,

  Joe K.

    "CalSun" <calsun@gmail.com> wrote in message news:%23NWK10YjFHA.3656@TK2MSFTNGP09.phx.gbl...
    Joe and Paul thanks for helping and the links.

    I've double-checked the path and the configuration. They're all in tack. I tried again and it got thru from my laptop but the webserver.

    I discovered that the web svr doesn't belong to the domain (included in the _path). And I talked to the admin people and had them enable the LDAP from the firewall. The reason I do that 'cause the web srv is in the dmz zone.

    I'll come back to test it out tomorrow and hope it will work.

    I am sure whether the webserver could contact the AD box if it's not in the same domain.

    I will keep y'all updated.

    thanks again for the help.

    --CalSun

      "Joe Kaplan (MVP - ADSI)" <joseph.e.kaplan@removethis.accenture.com> wrote in message news:%236joTUXjFHA.2444@tk2msftngp13.phx.gbl...
      The problem is likely in your _path variable (which you do not show). If you don't specify a domain or domain controller name in the path, the ADSI/S.DS tries to determine a DC via the current security context. However, if the current security context can't do that, you'll often get this error.

      Try a path like:
      LDAP://yourdomain.com/DC=yourdomain,DC=com

      instead of one like:
      LDAP://DC=yourdomain,DC=com

      If that doesn't fix it, you might have firewall issues preventing LDAP access or something.

      Additionally, remember that when you specify credentials in a DirectoryEntry bind, they will be sent on the network in cleartext (in 1.1. anyway) unless you specify authenticationtype.Secure or AuthenticationTypes.SecureSocketsLayer (which requires SSL/LDAP support in AD).

      HTH,

      Joe K.

        "CalSun" <calsun@gmail.com> wrote in message news:us3Q$dVjFHA.3568@tk2msftngp13.phx.gbl...
        Hi all,

        I really need your help on this problem. (no help for 1 day goolging).

        I use form authentication on my 2 simple aspx pages.
        User is redirected to login.aspx, then see the main content page.
        I use LDAP to verify the user from a domain named Dserver where the AD users locate.

        Everything works just fine on my laptop (localhost). I could verify the user from the Active Directory. I am also able to verify whether the user belongs to a group named AllowDogs and redirect accordingly (main content page or fail-message).

        Problem: As I move this application to an existing IIS win2k3 std box, I failed to verify user from the Dserver. I got the error message "The server is not operational"

        Here is my IsAuthenticated code:

        Public Function IsAuthenticated(ByVal domain As String, ByVal act As String, ByVal ps As String) As Boolean

        Dim domainAndAct As String = domain & "\" & act

        Dim entry As DirectoryEntry = New DirectoryEntry(_path, domainAndAct, ps)

        Try

        Dim obj As Object = entry.NativeObject

        Dim search As DirectorySearcher = New DirectorySearcher(entry)

        search.Filter = "(SAMAccountName=" & act & ")"

        search.PropertiesToLoad.Add("cn")

        Dim result As SearchResult = search.FindOne()

        If (result Is Nothing) Then

        Return False

        End If

        'update the path to the user in the directory

        _path = result.Path

        _filterAttribute = result.Properties("cn").Item(0)

        Catch ex As Exception

        'Throw New Exception("Error authenticating user: " & ex.Message)

        Return False

        End Try

        Return True

        End Function

        Thank you all for help/reading
        --CalSun

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